Apparatus for manufacturing plaster-board.



J. E. SCHUMACHER. 5 FOR MANUFACTURING PLASTER BOARD. APPLICATION HLED 0619. 1917.

APPARATU Patented Dec. 3, 1918.

/Illilliiill To oll: tolwm it ma conccrn Be-s it known that i'osnrir E. SCHUMACHER, or LOS ANGELES,

arase r nt,

CALIFORNIA.

v Specification of Letters 'Patent.

Application filed October 9, 1917. Serial No. 195,881.

I, Jo'sErH'E; SCHU;

:BIACIIER, a citizen of the United Statics, re-

iii

reliable and thorough-supporting of the a paratus'a'll-as hereinafter inv the drawing and finallypolnted out in;

,D QYEd; to (reliably I I walls-which regularly formed that an effective keying siding'at, os Angeles, inthe-county of Los ,.'Angelesand=-State of California, have in- Vented newv and useful Improvements in Apparatus, for Manufacturing- Plaster-Board,

of which the following is a specification.

.4 This invention relatesto improvements in apparatus for manufacturing plaster board cfgthetype "tion for patent for 16,} 1917, Serial definedv in my pending applicaplasterboard filed March ,No.-155,233; and resides in .the prov1sion of 'lHeXp11SlV6,-Slmply. con- 1s t'ructed,reasily;operable, reliable and piles- .ti,ve means'ior producing surface irreglzlari- 'ties,"such-as openings, in plaster board, so I that plaster; board thus provided with surinay be effectively en1- support a'wall element such as plaster coatings or the lilreg'such apf'ace irregularities pa ratu's, being-disclosed in my 'pendin application for patent, March 16, 19l 7.- l

, Another and more specific object is to provideapparatus of the character defined which comprises punch device of'such construction that will provide for the punching of peculiarly formed openingsthrough plaster; hoard, .said openings, having confining gareso mutilated, broken or'ir- Serial No, itsees filed action iSpI'oVidedWhen plastic coating is appliedtothe board and enters said openings; the, advantage thus derived'belng the plastic coatingby the board;

The-inventionfurther-consists in the novel and useful association, construction, organization; and interrelation of parts of the apde'scribed, shown claims; In the drawing": r

F igure 1 represents an enlarged View of apparatus; constructed in accordance with the invention showing the punch in side elevation in the position "it would assume after completing it punching operation, and the diesiWcOiipe'i'ationwith the punch and also last-erfb'oard broken away and .in sec paper or some other 2 5s a iewsimilar to Fig. 1 showing thepunchin the would assume Fig.3 is a bottom plan view o Fig. l is a. fragmentary, sectional View through a plaster board showing the peculiar construction of the openings formed by the punch;

F1g. 5 is a top invention;

Patented .llvec. 3, i918.

plan View of a plaster board formed with the apparatus embodying this p f the punch Fig. Sis a fragmentary SldlE- elevation of a modified form of punch; and

Fig. is a. fragmentary plan View of plasterboard provided by the modified form of punch shown in. Fig. 6.

Referring particularly designates as an entirety 2 of which is reduced as working extremity, such reduced portion 3 constituting the punchpropcr and being as shown of the rectilinear outline in cross section. In this connection it is to be understood that the crow sectional shape of the punch may be varied as desired, it being preferable, however, to provide for a shape to the drawing, A a punch, the shank such as illustrated. The lower end of the 80 punch is tapered to a. point and formed with facets or end faces 4 which definecutting edges 5 therebetween. The tapered working end is reduced so as to provide a series of shoulders 6 corres onding in number to the faces 4 and-which define cut-tihg' edges The herein-above described construction of the working end of the punch is preferable, but it is to be understood that any other suitable formation of said working end may be used as long as the end of the punch is constructed so as to penetrate the plaster board.

There are provided dies B and C for co operation with the punch A, the die B, hav-' ing a bore. 8 to receive the punch in approximately a Working" fit, Whereas the die C is provided with a bore 9 of a greater diameter than that of the punch sothat said punch does not come into contact with the walls of said latter bore. The dies Bland C are supported by suitable means'xnot shown, in facial contact with the plaster board 1) to be operated upon, the die B being uppermost, whereas the die Cis lowermosa The plaster board D comprises a plastic body-a disposed between facial sheets 6' and c of material, sucli ,ill

as shown in Fig, l of a the drawing, the punch 7 is operated so as to penetrate the board D and makes a clean hole in its first penetration of the plaster board D, but as the punching operation pro ceeds toward the die C, which fails to support the plaster board closely up to the field of the punching operation, the penetrating pressure of the punch tends to advance or push the material of the plaster board into to the bore of the die G, or, in other words, to buckle the plaster board to the breaking point or'to disrupt the same. It will thus be seen that a clean-cut is made through the facial sheet I) of the plaster board, whereas the irregularity of puncture increases in the plaster board body beyond the sheet I; and

' toward the sheet 0 due to the buckling action of the plaster board; and there is provided a ragged and irregular inner wall for the opening produced by the punch through the board. To insure against the cutting of the paper about the rims of the bore of the die 0 the upper edge of such bore may be rounded as at 0 or otherwise made dull. The facial sheet 0 is irregularly ruptured and formed into ragged and spaced tongues or ribbons that are directed into the bore 9 as the punch punctures said sheet 0, this being illustrated particularly in Figs. 1 and 2 of the drawing.

The cutting edges 5 provided at the working end. of the punch facilitate the punching operation, making theuoperation as a whole more accurate and efiective. The cutting edges 7 provided'by the shoulders 6 cause a clean-cut to be made through the facial sheet 6 of the board D and likewise produce a scraping action upon the portions of the sheet a which are forced into the bore 9 of the die C. These shoulders 6 together with the cutting 40 edges 7 scrape and remove particles of plas-H tic material from the tongues or ribbons of the sheet 0 which extend into the bore 9. When the punch is withdrawn the tongues or ribbons, which, for the sake of clearness are designated d, spring or move toward the plane of the sheet I), that is, t end to re store themselves to their normal plane. This is due to the slight inher'eiit spring quality of the material comprising the sheet '0, or better, the tongues d.

It will thus be seen that in this manner with the hereinbefore described apparatus, a plurality of openings through plasterboard may be provided so that plaster board will beprepared to receive a plastic or cementitious wall coating and to effectively support such coating.

Referring particularly to Fig. 6 it will be seen that there is provided a modified to form of punch which is generally designated E. This punch is provided with a reduced tapered working end 10, the reduction of which defines an annular scraping edge 11 corresponding to the scraping edges 7 of to the preferred form of punch. The body of this type of punch is cylindrical instead of rectilinear in cross section, whereas the reduced portion 10 is conical instead of pyramidal in outline. This type of punch operates in the same manner as the preferred form, but provides openings of the general outline indicated in the fragment of board shown in Fig. 7

It is manifest that many riations in detail of construction of the de ice as herein described and illustrated, may be made dependent upon conditions concurrent with the adoption of the same, in departure from the foregoing description and statement, but without departing from the spirit and scope of the invention as disclosed.

What I claim is:

1. Apparatusof the character disclosed,

comprising die members between which plaster board is adapted to be placed, there being registering openings formed through said die members, and a punch member adapted to extend through said Openings, said punch member having a Working fit through the opening in the uppermost die member and said lowermost die member having its opening of greater diameter than the punch so as to avoid contact therewith.

2. Apparatus of the character disclosed, comprising a die member adapted to support plaster board, a punch for penetrating the plaster board and having its working end reduced and tapered to a point, the reduction of said working end providing scraping edges, and another die member adapted to be mounted upon the plaster board over the first named die member and having an opening therethrough in which the punch a has a working fit, said first named die member having an opening therein of greater diameter than the punch.

3. An apparatus for puncturing plaster board having sheet coverings, and rupturing one of the coverings without severing the ruptured portion of the covering, said apparatus including a die member for the su port of the plaster board, and a punch, tii opening of the die member having a sufficiently greater diameter than the punch to provide a clearance space for the ruptured portions of the sheet covering when the punch is forced into the die to remove the plaster material from the opening.

4. An apparatus for puncturing plaster board having sheet coverings and rupturing one of the coverings without severing the ruptured portion of the covering, said aparatus including a die member for the support of the plaster board, and a punch having a pointed end and peripheral shoulders at the base of the pointed end, the opening of the die member having a sufiiciently greater diameter than the punch to provide a clearance space for the ruptured portion of the sheet covering when the punch is forced intothe die to remove the plaster material from the opening.

5. An apparatus for puncturing plaster board having sheet covermgs' and rupturing one of the coverings without severing the ruptured portion of the covering, said apparatus including a die member for the sup gort Of-the plaster board, and a punch which as a pointed end and is provided with cut-- ting edges at the sides of the pointed end,

- the opening of the die member having a sufficiently' greater diameter than the punch to i .provide a clearance space for the ruptured portions of the sheet covering when vthe punch is'forced into the die member to replaster material from the opening.

move the 6 An apparatus for puncturing plaster board havlng sheet coverings and rupturing one of the coverings without severing the ruptured portion of the covering, said apparatus including a die member for the support of the plaster board, and a punch constructed with a pointed end and peripheral scraping shoulders surrounding the base of.

the pointed end, the sides of the pointed end being provided with cutting edges, and

JOSEPH E. SCHUMAOH ER.

Witnesses RAYMOND IVES BLAKnsLEn, C. A. NIMMO. 

